Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
doi chieu » doc hieu, doi chi, mot chieu
tranh ung » trinh ung, tranh nhung, tranh quang
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
ho chieu » theo chieu, hoc thieu, mot chieu
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (ho chieu)) xanh - hanh tranh ung dung cong vang ((toan tap) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - hanh tranh ung dung cong vang ((toan tap) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) xanh - hanh tranh ung dung cong vang ((toan tap) OR (toan ban))*".